Brand guidelines and pattern libraries are popping up all over the place as maintaining your brand across multiple touch points becomes more and more important.
findguidelin.es is an excellent resource featuring some of the more well known brands on the web today. I particularly like the work ...

Loving the elegant aesthetic of Paris-based, Swedish-born designer Hampus Jageland's work. I fell in love with his work for Edge Board a while back and have only now gone to dig further on his work. Really nice stuff.
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